Contents: Camshaft adjuster ↡ Camshafts ↡ M112/113 Camshaft Bearing Cap Bridges ↡ Rocker arm axles ↡ Camshafts ↡
Note: The bolts securing the camshaft sprockets must be replaced without fail.
Camshaft adjuster
111 Series Engine Camshaft Adjuster Installation Details (1 of 2)
111 Series Engine Camshaft Adjuster Installation Details (2 of 2)
The installation details of the camshaft adjuster on the 111 series engine are shown in the illustrations to which all references in the text refer.
Removal
1. Remove the cylinder head cover (18).
2. Remove the front cover (23) of the cylinder head (see Section Removal and installation timing belt covers).
3. Turning the crankshaft in the normal direction, bring the piston of the first cylinder to the 20° after TDC position and fix the camshafts (75 and 78) with locking rods (01).
4. Use a marker to mark the position of the timing chain (73) relative to the camshaft sprockets (76 and 13).
5. Remove the chain tensioner (58) (see Section Removal and installation of timing drive components).
6. Remove the exhaust camshaft sprocket (76).
7. Remove the adjuster from the intake camshaft.
Installation
1. Install the regulator in its regular place.
2. Thread the sprocket (76) into the chain and place it on the shaft journal.
3. Install the chain tensioner (58).
4. Remove the locking rods (01).
5. Turn the crankshaft twice in the normal direction, then check the basic setting of the camshafts (see Section Setting the base position of the camshafts).
6. Install the front cover (23) of the cylinder head (see Section Removal and installation timing belt covers).
7. Install the cylinder head cover (18).
Camshafts
111 Series Engine Camshaft Installation Details
1. The details of the installation of the camshafts on the 111 series engines are shown in the illustration, to which all references in the text refer.
2. Remove the front cylinder head cover (see Section Removal and installation timing belt covers).
3. Turn the crankshaft in the normal direction, bring the piston of the first cylinder to the position 30° after TDC - in this position of the engine, the camshafts can turn without the risk of collision of the valves with the pistons.
4. Make sure that the basic installation of the shafts is correct (see Section Setting the base position of the camshafts), then use a marker to mark the position of the timing chain (73) relative to the camshaft sprockets (75 and 76).
5. Remove the chain tensioner (14) (see Section Removal and installation of timing drive components).
6. Remove the exhaust camshaft sprocket (76).
7. Lift the chain (73) and remove the intake camshaft sprocket (75).
8. Using an open-end wrench (1), turn the camshafts (77 and 78) in such a way as to weaken the force developed by the valve springs as much as possible - the cams should turn with their heels towards the tappets.
9. Mark the camshaft bearing caps, then remove the mounting bolts and caps.
10. Carefully remove the camshafts from the cylinder head.
11. Installation is carried out in the reverse order - ensure that the bearing caps are positioned correctly.
M112/113 Camshaft Bearing Cap Bridges
Installation details of camshaft bearing cap bridges for engines of series 112 and 113
Tightening order of the camshaft bearing cap bridge mounting bolts on 112 series engines
Tightening order of the camshaft bearing cap bridge mounting bolts on 113 series engines
1. The installation details of the camshaft bearing caps on the 112 and 113 series engines are shown in the illustration to which all references in the text refer.
2. Remove the cylinder head covers.
3. Turning the crankshaft in the normal direction, bring the piston of the first cylinder to a position 40° after TDC, in which there is no risk of the pistons colliding with the valves when turning the camshafts.
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4. Remove the chain tensioner (A) (see Section Removal and installation of timing drive components).
5. Tie the timing chain to the camshaft sprockets to prevent it from slipping.
6. In the reverse order to that shown in the illustrations, loosen and remove the mounting bolts, then remove the bearing cap bridges.
7. Installation is carried out in the reverse order - tightening of the bolts securing the camshaft bearing cap bridges must be carried out strictly in a specific order.
Rocker arm axles
Installation details of rocker arm axes of valve drive on engines of series 112 and 113
The installation details of the rocker arm shafts for the valve drive on the 112 and 113 series engines are shown in the illustration to which all references in the text refer.
Removal
1. Remove the camshaft bearing cap bridge (see above).
2. Heat the bridge casting evenly to a temperature of approximately 150°C, - no more than 160°C!
3. Place the bridge on the board (4) and remove the hollow rocker arm axle (1) from it by carefully tapping it from the opposite side through a punch (1) with a diameter of 15 mm.
4. Check the condition of the axle and rocker arms, replace faulty components.
Installation
1. Heat the axle evenly to 150°C, cool the rocker shaft and gently tap it into the axle using 16 mm diameter guide shafts (exhaust assembly) or 18 (intake assembly) millimeters, - when the axle is knocked, simultaneously remove the guide shaft, make sure that the rocker arms do not become skewed.
2. Align the rocker arm axle by inserting a pair of mounting screws through the holes in the bridge caps.
3. Install the lid bridge (see above).
Camshafts
Camshaft installation details for 112 and 113 series engines
The installation details of the camshafts on the 112 and 113 series engines are shown in the accompanying illustration, to which all references in the text refer.
Removal
1. Remove the cylinder head covers.
2. Turning the crankshaft in the normal direction, bring the piston of the first cylinder to a position 40° after TDC, in which there is no risk of the pistons colliding with the valves when turning the camshafts.
3. Remove the chain tensioner (2) (see Section Removal and installation of timing drive components).
4. Remove the Hall sensor (1).
5. Remove the camshaft sprocket, having first tied the timing chain to it.
6. Remove the bearing cap bridge (4) (see above).
7. Remove the camshaft.
Installation
1. Install the camshaft into the cylinder head.
2. Install the bearing cap bridge (4) (see above).
3. Set the camshaft to the base position (see Section Setting the base position of the camshafts).
4. Install the camshaft sprocket.
5. Install the Hall sensor (1)
6. Install the chain tensioner (2) (see Section Removal and installation of timing drive components).
7. Check that the timing marks are aligned correctly, then install the cylinder head covers.